I bought a Colt DS from the LGS. The cylinder flutes, trigger guard, and backstrap were all matte blue, while, the rest was regular blue. I managed to get a $10 discount because we honestly didn’t know if it was a Bubba Job. A retired Philadelphia PD officer works there, and he said it was Duo-Tone, and was correct. I don’t know how they did it so well, but it looked nice.
@Evil_Ed My focus was on the cylinder, so I didn’t notice it was matte. 😉